Muffler for explosive or other engines.



Patented May 27, 1902.

A. L. KULL. MUFFLER FOR EXPLOSIVE OR OTHER ENGINES.

(Application filed Mar 22, 1901. Rmzwnd Dec. 9. 1801.)

(No Model.)

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UNITED STATES PATENT OFFICE.

ALBERT L. KULL, OF CAMDEN, NEYV JERSEY.

MUFFLER FOR EXPLOSIVE 0R @THER ENGINES.

SPECIFICATION forming part of Letters Patent No. 700,785, dated May 27, 1902.

Application filed March 22, 1901. Renewed December 9, 1901. Serial No. 85,251. (No model.)

To aZZ whom it may concern.-

Be it known that I, ALBERT L. KULL, a citizen of the United States, residing at Camden,in the county of Camden and State of New Jersey, have invented certain new and useful Improvements in Mufflers for Explosive or other Engines, of which the following is a specification.

My invention has relation to a muffler for use on engines to suppress the noise of the exhaust and to eliminate back pressure, and in such connection it relates to the construc tion and arrangement of said muffler.

The principal object of my invention is to provide a muffler for the exhaust of an explosive or other engine, which muffler, while deadening the noise made by the outrushing exhaust, willinterpose no obstacle to the path of the exhaust and will hence prevent back pressure. The muffler of my present invention, while designed primarily to accomplish these results, is yet of simple and compact form, and therefore particularly applicable for use upon engines for automobiles.

The nature and scope of my invention will be more fully understood from the following description, taken in connection with the accompanying drawings, forming part hereof, in which- Figure 1 is a longitudinal central sectional View of a muffler embodying main features of my invention. Fig. 2 is a cross-sectional View taken on the line 2 2 of Fig. 1. Fig. 3 is a cross-secti0nal View taken on the line 3 3 of Fig. 1, and Fig. at is a cross-sectional view taken on the line l 4 of Fig. 1 and looking toward the outlet end of the muffler.

Referring to the drawings, a represents a tube of required length comprising the easing proper of the muffler. The inlet end of this tube is connected by a frusto-oonical tube 1) with the exhaust-pipe 0, leading from the engine. (Not shown.) The cross-sectional area of the pipe 0 is much less than the area in cross-section of the tube CL, and hence the frusto-conical tube 1) constitutes an expanding-chamber for the gases prior to their entrance into the body CL of the muflier. [it

the point of junction of the expanding-tube l) and main tube a, and within the tube a or tube 1) is fitted a circularplate or partition (I, having a series of openings d, the area of each of which openings being preferably ap proximately the same as the area of the exhaust-outlet 0. Of the series of openings (1 one is preferably centrally located in the partition d and is in alinement with the exhaustpipe 0. In each opening d is fitted the base or entrance end of a tapered or substantially conical tube-like finger e, the apex or exit ends of of all these tubes c being substantially the same in cross-sectional area as the area in cross-section of the exhaust-pipe 0. These tapered tube-like fingers e have perforations e in their walls and project Within the tube a for a greater or less extent, as required. The open end of the tube a is closed by a perforated plate or partition f, and, if desired or required, intermediate of the partition (Z and partitionf may be arranged one or more partitions g, each of which carries a series of peripherally-perforated tube-like fingers g, corresponding to the fingers e and preferablyiu alinement therewith. The gases as they escape from the pipe 0 are first expanded in the chamber Z) and then pass without obstruction into and through the fingers e and are again expanded within the tube a, and so on until they escape through the perforated partition f at the outlet end of the tube or muffler C1,. There is no obstruction placed in the direct path of the gases, and they therefore can pass in a straight direction through the muffler, and no choking up or back pressure can result. The gases cannot collect in the muffler, for they are carried out by the onrushing gases passing through the fingers. The perforated walls of the fingers c and 9 permit the ready escape of gases through the walls of the fingers if the pressure is excessive, and hence the fingers, while muffling or deadening the sound of the exhaust, do not confine the gases in their passage to the outlet f.

Having thus described the nature and object of my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A muffler, comprising a tube constituting the main body of the muffler, a frusto-conical tube connecting one end of said tube with the exhaust-pipe and constituting an expanding-chamber for the exhaust-gases, a partition located at the outlet end of the expanding-chamber and within the body of tho muf fier, said partition having a series of openings, each of which is substantially equal in crosssectional area to the area of the exhaust-pipe, and a series of tapered tube-like fingers extending Within the body of the muffler from the openings in said partition, the area of the contracted outlets of the fingers being substantially equal to the area of the inlet of one of said fingers, and the inlet of one of said fingers being arranged in alinement with the exhaust-pipe, substantially as and for the purposes described.

2. A Inuflier, comprising a tube constituting the main body of the muffler, a perforated partition closing, the outlet end of said body, a frusto-conical tube connecting the entrance end of said body with the exhaust-pipe, a partition arranged at or near the entrance end of said body and provided with a series of openings corresponding to the opening in the exhaust-pipe, one of said openings being in alinement with the exhaust-pipe and a series of tapered tubes projecting from the openings in the partition into the body of the muffler, the area of the contracted outlets of said fingers being approximately equal to the area of the exhaust-pipe opening, substantially as and for the purposes described.

3. A muffler, comprising a tube constituting the main body of the m u f'fler, a frusto-conical tube connecting one end of said body to the exhaust-pipe, a partition located between the frusto-conical tube and the body of the muffler, said partition having a series of openings each corresponding in area to the area of the exhaust-pipe outlet, and a series of tapered open-ended tubes extending from said openings into the body of the muffler, the Walls of each tapered tube being perforated, substantially as and for the purposes described.

4. A muli'ler, comprising a tube constituting the main body of the muffler, a frusto-conical tube connecting one end of said body with the exhaust-pipe, a partition arranged Within the main body adjacent to the frusto-eonical tube, said partition having openings each corresponding in area to the area of the exhaustoutlet, a series of tapered tubes projecting from the openings into the main body of the muffler, a second perforated partition and a second series of tapered tubes projecting therefrom and corresponding to the first partition and first series of tapered tubes, said second partition and tapered tubes being arranged Within the main body of the muffler and intermediate of its ends, substantially as and for the purposes described.

In testimony whereof I have hereunto set my signature in the presence of two subscribing Witnesses.

ALBERT L. KULL.

Witnesses:

.T. WALTER DOUGLASS, THOMAS M. SMITH. 

